Carbureter.



J. S. GOLDBERG.

OARBURETER.

APPLICATION FILED DEG.17, 1910v 1, 1 1 9,078, Patented Dec. 1, 1914.

3 SHEETSSHEET 1.

an n WlInasses 111W G uidh Egg y MQL 0iiv4wW- EH AW J. S. GOLDBERG.

GAEBURETER.

APPLIOATION FILED DEO.17, 1910.

Patented Dec. 1, 1914.

3 SHEETS-SHEET 2.

InvefiTET' uhn S. Goldberg g5 ABHS J. S. GOLDBERG.-

CARBURETER.

APPLIGATION FILED DEC. 17, 1910. 1,1 1 9,078. Patented Dec. 1,1914.

3 SHBETS-SHEET 3.

WiIiTE sses Inv ETIITJI" 5.Gn1dberg "fit . snares PATENT JOHN S. GOLDBERG, OF CHICAGO, ILLINOIS,.ASSIG1\TOR T0 STROMBERG MOTOR DEVIGES COMPANY, OF CHICAGO,

ILLINOIS.

CABBURETER.

To all tvhom it may concern Be it known that 1, JOHN S. GOLDBERG, a

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Carburetors, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to carbureters, such as are employed in association with automobile engines, and contemplates means for varying the richness of the combustible mixture produced thereby. Primarily, my invention provides an improved arrangement for properly adapting the carbureter to the demand, made by the engine with which it is associated, on starting; secondly, my invention provides an improved arrangement for varying the richness of the mixture during the running of the engine; and thirdly, my invention provides improved means for varying the fuel supply between certain definite limits.

With reference to the first feature of my invention, it is well known that upon starting an engine, the suction on the intake stroke is not very strong, and, where a fuel inlet and an air inlet are connected with the compression chamber by suitable pas sages, the suction at starting is not strong enough to cause the response of the fuel, the air inlet affording the path of least resistance. It has thus become the practice to prime the carbureter by placing an auxiliary source of fuel in'the path of the air inlet so that this special supply will necessarily have to be responsive to the initial strokes of the engine. ment is shown in the application of Harry C. Tillotson and myself, Serial NOA'MQYS, filed January 26, 1909, which application has now become Patent No. 1,099,293, dated June 9, 1914. In the structures described in the co-pending application a priming cup which is adapted to contain oil, by special mechanism under the control of the operator is flooded when the engine is start ed. My present invention completely eliminates the use of such an auxiliary fuel arrangement and, broadly, is in the nature of means for temporarily closing, Or nearly closing, the air inlet which acts in parallel with the fuel inlet. it will appear that Specification of Letters Patent.

Such an arrange-.

Patented 13sec it, 19141. 1910. Serial No. 597,757.

even though the suction is weak, the increase in the resistance in the path of the air nlet will concentrate the efiect of the suction upon the fuel inlet, which will then be responsive so that a combustible mixture of the desired richness is secured.

The carbureters of my invention, like the carbureters disclosed in the co-pending application referred to, is of the multiple jet type; that is, one jet is always in service and, when the demand is sufliciently increased, a second jet, which is independently associated with an auxiliary air inlet, is automatically brought into play. in my present structure this second jet and the auxiliary air inlet are normally held closed b connected mechanisms through the medium of a spring. This application has been divided and a divisional application filed March 19, 191 in this divisional case claims are directed toward the feature just referred to. As will appear, the tension of this spring will determine the required amount of suction to which the secondary arrangement will be esponsive and, although means is provided for permanently adjusting the spring, my present invention contemplates means for temporarily adjusting the tension of this spring so that, while the engine is running, the operator may control the secondary supply to vary the richness of the mixture in that Way.

The primary fuel inlet is always responsive to the engine; that is, it is always in action, and it is desirable to adjust the spray at this main fuel inlet or, in other words, to adjust the amount of fuel passing therethrough. My present invention contemplates an improved nozzle and is directed toward the provision of means for varying the effective passageway through the nozzle between definite limits, these limits being imposed so that an inexperienced person cannot, in attempting to adjust the nozzle, bring the same to a point where it would be inoperative.

My invention is embodied in the structure illustrated in the accompanying drawings, in which Figure 1 is a vertical longitudinal sectional view of the carbureter and reservoir associated therewith; Fig. 2 is a vertical cross-sectional view taken on the plane of the line a, a, of Fig. 1, and looking in the under Serial No. 825,756:

direction indicated by the arrows; and Fig. 3 is a plan view of the carbureter; and Fig.

4 is a detail view of the starting mecha-.

nism which will be described.

The carbureter frame is preferably an integral casing 1, from the lower end of which extends the shelf 2 for supporting the float chamber and the fuel valve mechanism associated therewith. Extending from the top of the body part of the casing 1, at the side opposite the shelf 2, is the casing 3, which forms an auxiliary air inlet chamber 4 and serves to support the various parts of the secondary automatic valve mechanism which will be described. The main body part of the casing comprises the annular base 5 from which the outer cylindrical shell 6 extends upwardly, this shell being supplemented upon inner shell 7 as clearly shown in the drawings. The space between the shells'6 and 7 forms a heating jacket through which hot water may be circulated by means of the inlet 9 and outlet 10, as shown in Fig. 2. 1

The plugs 11 and 12, shown in Fig- 2, may be removed and inlet and outlet 'pipes substituted therefor for the purposes of furwhich supports a sleeve as to lower the needle valve,

ther circulation, if desired.

Across the base 5 is the bridge section 14 15 extending downwardly therefrom in axial relation with the base 5 and the shell 7. The bridge 14: also supports .the upwardly extending sleeve 16, which is disposed in axial alinement with the sleeve 15. The sleeve 16 is provided with an axial threaded opening in which is threaded a nozzle piece 17, this nozzlepiece havingthe nozzle opening 18 and the central bore 19 which thus communicates with the inside of the sleeve and "thereby connects with the horizontal passageway 20 which leads to the shelf 2, as will hereinafter he described. The lower end of the sleeve 15 is internally screw-threaded for the reception of a plug 21, this plug having a central bore for the reception of the stem 22 of a needle valve 23. This stem 22, at its lower end, passes into a pocket 24 in the plug, which pocket is provided with screwthreads for the reception of the screwthreaded adjusting piece 25, rigid relation with the stem 22. As will be apparent from the drawings, this adjusting piece 25 is adapted for manual manipulation, and it is clear that turning the adjusting piece one way or the other will result in the upward or downward movement of the stem 22 and consequently of the valve part .23. This valve part 23 is in the form of a needle valve and is provided with the axial passage 26 and the cross passages 27, 2?, connecting therewith. When the adjusting'piece 25 is turned so the head of the the inside by an hich is in,

'..valve 23 willbe separated from the nozzle piece 17 so as' to leave an annular passageway, the nozzle piece, in this instance, having a tapered seat for the reception of the tapered valve head. The resulting annular passageway acts in parallel with the passageway tion is applied at the nozzle opening 18 fuel may be drawn through the passageway 20, up throughthe sleeve, through the passageway 26 alone or in conjunction with the annular passageway, through the bore 19, and through the nozzle opening 18. Since these are fuel passageways, the plug 21 is-stufied, as indicated at 28, the stufling box being completed by means of the collar 29, which has threaded engagement with the pocket in the plug.

The arrangement above described, thispose of adjusting the fuel spray.

The nozzle opening 18 is the maximum nozzle opening and the passageway 26 is the minimum nozzle opening. In other words, the nozzle opening 18 is larger than the passageway 26, the former being the desired maximum limit and the latter being the desired minimum limit. It will appear that when the valve head 23 is screwed up tight into the nozzle piece 17 the passageway 26 will determine the flow of the fuel. And since this passageway determines the flow alone, it will appear that when the parts are in this position the minimum flow of fuel will take place. Whenjt is desired to increase the amount of fuel passing from the nozzle, the adjusting piece 25 is turned in the proper direction so as to separate the valve head 23 from the seat in the nozzle piece 17 so as to supplement the passageway 26 by the annular passage. adjusting piece 25 is turned so as to lower the conical head 23 away from its conical seat, the annular passageway gradually hecomes lar r and the flow of fuel may be increased ntil the combined eflective areas of 26, and it will appear that if suc- Thus as the the annular passageway and the passageway tinued manipulation of the adjusting piece 25 in that direction will have no effect, since the nozzle opening-18 alone will determine the flow of fuel. This will be the maximum flow; Thus even thouglf the adjusting piece 25 be screwed down to its limit, no less than the desired minimum flow of fuel takes place. Similarly, if the adjusting piece 25 is turned in the opposite direction to such an extent as to move the head 23 a considerable distance from the nozzle piece 17, no more than the maximum flow of fuel will take place, and the entire arrangement is, therefore, guarded againstimproper manipulation by an inexperienced person.

The lower section of the shell 7 is of the ward so that the imaginary apex of the up.

right angles to the axis of the the operator.

same inner diameter, as that of the annular base portion 5, while the intermediate zone of the shell 7 converges conica-lly upper surface of said zone will coincide with the upper end of the nozzle piece '17. The upper section or zone 31 of the shell 7 diverges toward and meets the upper end of the outer shell 6. We thus have a more or less central passageway through the carbureter, the lower zone of this passageway being cylindrical, the intermediary zone conicaily convergent and the upper zone divergent, the nozzle end lying in the apex of the intermediary conical zone. The lower end of the passageway, as will be described later, during the running of the engine, is opento the atmosphere, and air can there fore enter and flow upwardly through the passagewa this air being deflected y the conical wa is of theintermediary zone and its energy directed across the outlet of the nozzle to extract oil therefrom; and the di- .yerging zone will cause the air and oil to ome thoroughly mixed to form a suitable mixture with which the engine is to be "suplied. p A socket member 32 is slipped over the downwardly extending sleeve 15 and is held in place against the bottom of the sleeve 15 by means of the nut portion 33 of the plug 21, as clearly illustrated in Figs. 1 and 2. This socket member 32 is provided with a prong 34 which engages a lug 35 extending from the base portion 5 of the carbureter casing proper. This engagement prevents the cup and the parts carried thereby, as will be described, from turning when all the parts are properly set in place. The major portion of the socket member 32 is in the form of a sleeve surrounding the sleeve 15 and upon this outer sleeve a collar 36 is loosely mounted. This collar is of such diameter that it may close the main inlet passageway of the carbureter, but it is normally held in its open position, against a suitable shoulder 37 on the socket member 32, by means of a helical spring 38 resting in an annular groove 39 in the collar and engaging theunder side of the bridge 14, all as indicated in Figs- 1 and 2. The socket. member 32 is suitably enlarged, as shown, to pro vide a bearing for a pin 40 which extends at sleeves. Upon this pin one or more cams 41, 41 are secured, these. cams engaging the under side of the collar 29, as indicated in the drawings. Av lever 42 is also carried upon this pin and this lever is connected, in any suitable manner, with means within reach of Thisjarrangement is shown in detail in Fig. 4. It will be seen that when the lever arm 42 is turned in the right direction the cams will be rotated so as to raise the collar 36, which will then engage cally opposite slots 56 and 57 the bottom of the annular base 5, thus closing the main air passageway for a purpose herein'before broadly referred to and hereinafter more particularly pointed out.

The shelf 2 supports the cylindrical glass shell 43, covered by a cap 54., the base,'the shell and the cap forming an oil receptacle. The shelf 2, which, exce t for its connection with the main body of t e carbureter, is circular, hasa central opening which is sur rounded by a flange 45 and a fuel inlet frame 46 is held tightly against this flange by means of a con ling 47. The shelf 2 supports a valve dis 48,1:he central portion of which is in the form of a boss extending down through the central opening, this arrangement being held tightly in place by means of a nut 49. 1 e valve disk 48 has the central passageway 50 which thus connects with the source of fuel, this central passageway, as shown in the drawings, be mg countersunk to form a suitable beveled a ve seat. Extending upwardly from the valve disk, concentric with Jth way 50 is a. sleeve 51 which is screwthreade at the top so that it may engagia'- by that means in a central openin in the cover 44 and so hold the cover in p ace. A stem 52 is dis osed in this sleeve, this stem being provide at the bottom'thereof with a pocket in which a valve spindle 53 is hung upon a pin 54:. The valve point 55 is adapted to engage the seat in the valve disk 48 so as to control the passageway 50. The lower end of the sleeve 51 has the diametriacross which pins 58, 58 are disposed. Upon these pins the foot-shaped levers 59, 59 are mounted, the toes 60, 60 of these levers being arranged to engage the lower end of the stem 52, as clearly illustrated in Fig. 1

An annular float 61 encircles the sleeve and is loosely rise and fall with the level of the oil in the float chamber, as will be pointed out. The main portions of the levers 59, 59 engage the under side of this float and it is clear that the weight of this float will cause the main'portions of these levers to move downwardly while the toes thereof will move upwardly and raise the stem 52 against the tension of the helical spring 61", which is disposed inside the sleeve 51} around the stem 52 between a shoulder 62 on the stem and the inside of a cap 63 which screws down over the outside of the sleeve. It will be apparent that since the oil enters through the passageway 50 the float 61 will be gradually raised and because of such operation the spring 61 will force the valve head 55 down to {close the passageway 50 to a greater or less extent. As the oil in the float chamber, the passageway 20, and associated passageways, becomes depleted, the float 61 will gradually lower and allow more oil to enter e passage- I grooves ,through-the passageway 50; and thus a constant supply of oi is maintained. It is apparent that the tension of thespring 61 may e adjusted by screwing "the cap 63 down upon the stem 51 to a greater or less extent, and in order to lock the cap 63 in any 'adjusted position I provide a series of. vertical 64, 64 therein. Associating with these grooves is a plunger 65 which rides in a pocket in a screw 66 suitably mounted in a boss 67 on the cover 44, the helical spring .68 being provided to maintain the plunger 65 in engagement with oneof the grooves 64. The plunger 65 has a rounded head so that the cap. .63 "may be turned without any particular unlocking, but it is clear .that the lunger will hold the cap in position against eing jarred out of place or against any accidental movement. The stem 52passes out be yond the cap 63 through a bolt 69therein, and the stem has secured in its upper end a secondary cap 70 which extends over the end of the primary cap 63 so as to secure a'dustproof arrangement. If particles carried in the oil should become clogged in the valve seat at the passageway; 50 and should thus interfere with the operation of the valve and the parts associated therewith, thecap 70 may be grasped manually and raised against the tension of the helical spring '61 so as to work the valve head 55 and thus clean the arrangement at that point.

The frame section 71 above the walls 6 and 7 forms a mixing compartment or chamber 72 which communicates with the upper end of the main central passageway which has hereinbefore been described. The upper" end of the frame 71 has a flange 72 by means of which connectio'ri' may be made with the engine to be supplied. A shaft 74 extends diametrically through the frame 71 and carries a .diskvalve 75 operable by means of a su'table lever 76 also secured upon the shaft. -T e chamber 72 also communicates with the auxiliary valve chamber 4 by means of a passageway 77. On the top of the casing 3 15 supported the valve frame 78 which is constructed in the form of a spider and through which the valve chamber 80 may communicate directly with the atmosphere. The lower edge of the valve frame 15 beveled to form an annular valve seat 81, with which a disk valve 82 cooperates. The =valve disk hub 83 is secured to a valve stem 84, which passes axiall through the hub 85 supported from the va ve frame 78 by means of the radial members 86. The bottom of the easing 3 has an openingin axial alinement with the stem 84, which opening is surroundedby a sleeve 87 which extends a considerable distance downwardly. This sleeve is internally screw-threaded for the reception of the plug 88 which has an axial opening in which a- .thimble 89 is disposed, this thimble being providedjwith an annular shoulder 90 which .rests upon the -.top of the plug, as

. w u illustrated in Fig. 1. The axial poc et in the thimble 89 receives the lower end of the stem 84., The plug 88 is surrounded by the sleeve 91 which is held against the annular shoulder 92 on the plug by mearislof a pin .93, this cup extending upwardly, as shown in Fig. 1, to inclose the lower end. of the sleeve 87. A helical spring 95 surrounds the stem 84 and is disposed between the underside of the valve member 82 and the shoulder 96 on the thimble 89. It will appear thatwhen the thimble 89 rests upon the .top of the plug pieces 86. The sleeve 91 and the associated parts are the elements that areprovided for permanent adjustment of the spring 95 so that the valve 82may respond to the suction of the engine at the proper time.

In order to hold the sleeve 91 in any adjusted position, this sleeve is provided with a plurality of grooves 99 in the periphery thereof, these grooves being parallel to the axis and being adapted for the reception of a, plunger 100 which operates in a pocket in ascrew 101 which is mounted in a lug 102 extending from the casing 3. A spiral spring 108 is disposed in the pocket, as clearly illustrated in Fig. 1-, to hold the plunger 100 in engagement with any one of the 88, the tension of the spring 95 can be adrooves 99. The head of the plunger 100 is rounded so that unlocking is unnecessary and it, is merely required to turn the sleeve 91 against this dra until the succeeding groove is reached; his is sul'licient to hold the sleeve against movement by reason of jars or accidental mani ulation.

As has been describe ,the primary nozzle and air inlet arrangement are sufiicient to meet the demands of the engine only to a certain extent.- When the demand reaches a certain point the suction is sufficient to open the valve 82 against the tension of the spring 95 and, as has just been pointed out, the spring 95 is adjusted so that the response of the valve 82 may take place at the pro er time. In order that the tension of the va ve 95 may be varied while the machine is runn1 temporarily raising the thimble 89 upon which the lower end-of the spring rests. This arrangement is in the way of a hellcrank lever 104 whiehis pivoted at 105 in a andwhen it is notpra'ctical to operate the permanent adjusting means which has ,just been described, I provide means for 120 operates.

lug 106 extending from a. yoke 107 pivotally mounted upon the bottom of the plug 88 and upon the outside of the sleeve 87. The rounded lower end of the thimble 89 and the one arm 109 is connected at 110 with suitable connecting mechanism which leads to operating means Within the reach and control of the operator. It is seen, referring to Fig. 1, that when the bell-crank. lever 104 is turned in a clockwise direction the other arm 108 thereof will move upwardly to transmit the corresponding movement to the thimble 89. This will compress the spring 95 and will increase the tension thereon, and it is evidentthat while the bell-crank lever 104 is thrown over in this position the response of the val've 82 to the suction is retarded. Pivotally supported to the extension 111 from the frame 78 .is the lever 112 having the slotted end 113 which is adapted to engage'the lower surface of the locking nut 114, which is adjustably mounted upon the stem 84 by means of screw-threads, this nut being held in any adjusted position by means of balls 115, 115 held in diametrically opposite vertical grooves 116 by means of springs 117 disposed in pockets with the balls. The slotted end 113 of the lever 112 embraces the stem 84, as shown in Fig. 1. The slotted end 118 of the lever 112 engages the-head 119 of the spindle 120, the lower part of which is threaded and thus carries the needle valve 121. The spindle 120 may be adjusted as desired within the valve piece 121 and is held in its adjusted position by means of a set screw 122. A helical spring 123 encircles the spindle 120 and is disposed between the valve piece 121 and the top wall of the pocket 124 in which the spindle The lower end of the valve piece 121 is beveled to a point and engages the fiaringend 125 ofthe oil passage 126 in the main casing. This passage extends downwardly and is closed at'its lower end by means of the plug 127. The passage 20 extends to the right (Fig. 1) beyond the oil well formed by the sleeves 15 and 16 and on its end is provided with a threaded portion which communicates with the exterior. A. plug 128 provided with'a passageway 129 therethrough is inserted in the passage 20 so that it does not close or contract the passage 126. The end of the passage 20 is closed by means of the .screw plug 129'. The arrangement just described 'is particularly desirable for cleaning purposes.

As before pointed out, the effective area of the primary nozzle is permanently adjusted by means of the adjusting member 25 and the tension of the spring 95 is also adjusted by means of the cup 91. These parts having been properly set to meet the existing con ditions, the carbureter is ready for operation. The spring 61 which is associated with the float chamber is alsoproperly adjusted. Instarting, the lever 42- is moved so asto nearly close the central main air passageway through the carburetor, and it is clear that such operation will cause most of the suction to concentrate upon the nozzle openin v 18- Depend ng upon the x ent to which t e main passageway is closed, the valve 82 may or may not respond. It is a matter of, control and it is'pessible that the-conditions may be met with in various ways. It is clear that choking the main air passageway in this way and thus concentrating the suction upon the fuel inlet, the mixture will become a rich one such as is required in starting. After the engine is well started the lever 42 may be moved from the operators position so as to open up the main passageway to its maximum extent so that the greater proportion of air may enter. In the running of the engine, if it is desired to change the richness of the mixture, the bell-crank lever 104 may be operator from his position and the tension of the spring 95 may in that Way be adjusted, as has heretofore been described, to change the pressure upon the under side of the valve 82 and to thus change the degree of suction to which the valve is responsive. It is clear that by means of the lever 112 the opening of the valve 82 is accompanied by a corresponding opening of the supplemental fuel passage 126 and in this way the additional fuel for combustion. is supplied. The primary objects of my invention are consistent with my aim to secure operation which is simple and construction which is inexpensive and practical. I I claim as new and desire to secure by Letters Patent:

1. In a carbureter, an air inlet, a fuel nozzle in said inlet, and'a needle valve for said nozzle, said nozzle having a maximum passage and said needle valve having a minimum passage.

2. In a carbureter, an air inlet, a fuel nozzle, and a valve contrplling said nozzle, said valve having a by-pass of a cross-sectional area less than that of the nozzle openmg. I

3. In a carburetor, a casing having a centraljairpassage, a bridge across said passage, a nozzle mounted on said bridge and extending upwardly therefrom, the pocket of said nozzle having a valve seat, a stem adjustably mounted relative to said casing and extending up into said pocket, and a valve head to said stem tapered to engage said valve seat, said nozzle having a maximum oil passage and said head having a minimum oil passage therethrough.

4. In combination, a nozzle with a maximum opening, and a valve controlling said opening, said valve having a by-pass of less cross-sectional area than that of said maximum opening.

actuated .by the 5. A carbureter including a reservoir, a my name this 14th day of December, A. D. mixing tube;1 affeeii-vallve seat, and an ad}; 1910. justa e nee leee Va ve to C06 erate Wit s the seat and having a by-passage permitting JOHN GOLDBERG 5 limited feeding, when the Valve is on the Witnesses:

seat, from the reservoir to the mixing tube. ARTHUR H. BOETTCHER, In Witness whereof, I hereunto subscribe ALBERT G. MCCALEB. 

